This breaks i.e. packaging efforts where the caller expects distclean target to be equivalent to the dist tarball.

# mkdir -p a b
# tar jxvf libcdio-0.93.tar.bz2 -C a
# tar jxvf libcdio-0.93.tar.bz2 -C b
# cd b/libcdio-0.93 && ./configure && make distclean
# cd -
# diff -r a b
Only in a/libcdio-0.93/include/cdio: version.h
Only in a/libcdio-0.93/test: check_common_fn
Only in a/libcdio-0.93/test: check_cue.sh
Only in a/libcdio-0.93/test: check_iso_read.sh
Only in a/libcdio-0.93/test: check_iso.sh
Only in a/libcdio-0.93/test: check_nrg.sh
Only in a/libcdio-0.93/test: check_udf.sh
Only in a/libcdio-0.93/test/driver: bincue.c
Only in a/libcdio-0.93/test/driver: cdrdao.c
Only in a/libcdio-0.93/test/driver: nrg.c
Only in a/libcdio-0.93/test/driver: track.c
Only in a/libcdio-0.93/test: testgetdevices.c
Only in a/libcdio-0.93/test: testisocd2.c
Only in a/libcdio-0.93/test: testisocd_joliet.c
Only in a/libcdio-0.93/test: testisorr.c
Only in a/libcdio-0.93/test: testpregap.c
Only in a/libcdio-0.93/test: testudf.c